Barker Bros. M Schematic

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Product Information:
Model:M
Manufacturer:Barker Bros.

Schematic Pages

Schematics Content:

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Page 1:

BARKER PAGE 6-1

BARKER BROS. MODEL M
Schematic ,Vol tags
Alignment

Without Rear Fuse and Cover
Models L ,15, and P Alignment INTERMEDIATES No. 46Power Tubes
Connect a 262 K.C. oscillator to the lirst detector grid (No. 57 tube next to the dial) leaving grid cap in
lace. Remove oscillator tube (N'o. 56). Set dial at 100. Hook up vacuum tube volt meter as described and care-
lly adjust 6 varitor screws for maximum gain (minimum reading of meter). Don't flat top any stages. Have
a" shields in place. Keep volume control at lowest level.

OONDENSER GANG

Set dial at 100 when gang is at maximum position and tighten dial set screws. Tune in a station (or use an

oscillator) to a known frequency signal around 1400 K.C. Carefully adjust oscillator section of gang until
frequency is correct on dial.

If the intermediates are balanced on 262 KC"l the dial will now track within 5 K.C. over the entire dial.

Adjust Hrst detector section for maximum gain and follow by adjusting band pass trimmers. |

SILIN1 cuuTRoL cuss
'Munn u Nemesis

With Rear Fuse and Cover ML #__-_'-
'xase NoA 59 Power Tubes _

IF PEAK 262 KC.

0mm F; Rider, Publisher

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